| abstract |
A valve apparatus comprises a housing having an inlet port, an outlet port, a selectable flow port, and a vent. The apparatus further comprises a valve member which is moveable between: n a first position in which a flow path between the inlet port and the selectable flow port is substantially blocked and in which the vent is fluidly connected to the selectable flow port; and n a second position in which a flow path between the selectable flow port and the vent is blocked, and the selectable flow port is fluidly connected to the inlet port. |